package com.learn.mvc.interceptor;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.View;
import org.thymeleaf.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;


public class LoginInterceptor implements HandlerInterceptor {
    Logger logger = LoggerFactory.getLogger(this.getClass());
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.debug("preHandle execute...");

        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.debug("postHandle execute...");
        String user =(String) request.getSession().getAttribute("user");
        if (StringUtils.isEmpty(user)) {
            HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
        }else {
            HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);

        }

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.debug("afterCompletion execute...");

        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
